title: Two sandwich arsenomolybdates based on the new building block As(iii)Mo(7)O(27)(9-): [Cr(2)(AsMo(7)O(27))(2)](12-) and [Cu(2)(AsMo(7)O(27))(2)](14-).
abstract: The polyanions [Cr(2)(AsMo(7)O(27))(2)](12-) () or [Cu(2)(AsMo(7)O(27))(2)](14-) () have sandwich-like structures wrapping two transition metals between two [As(iii)Mo(7)O(27)](9-) fragments, and the fragment is unprecedented and can be viewed as a mono-capped hexavacant B-alpha-Keggin subunit with a central AsO(3) group.
authors.affiliation: Department of Chemistry, Northwest University, Shaanxi Key Laboratory of Physico-Inorganic Chemistry, Xi'an, 710069, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Li
authors.forename: Qiang
authors.initials: Q
authors.lastname: Shen
authors.forename: Ganglin
authors.initials: G
authors.lastname: Xue
authors.forename: Haisheng
authors.initials: H
authors.lastname: Xu
authors.forename: Huaiming
authors.initials: H
authors.lastname: Hu
authors.forename: Fu
authors.initials: F
authors.lastname: Feng
authors.forename: Jiwu
authors.initials: J
authors.lastname: Wang